Kurdish fighters say US special forces have been fighting Isis for months | The Guardian

On a damp afternoon in Iraqi Kurdistan, a 29-year-old peshmerga fighter named Peshawa pulls out his Samsung Galaxy mobile phone, flicks hurriedly through his library until he finds the video he wants, and presses play.

The clip, filmed just after dawn on 11 September, shows four tall and western-looking men in the heat of a battle against Islamic State militants in northern Iraq.